San Diego Chargers running back Branden Oliver runs upfield against the Jacksonville Jaguars during the first half of an NFL football game Sunday, Sept. 28, 2014, in San Diego. (AP Photo/Gregory Bull)(Photo: Gregory Bull, AP)

Oliver joins an inexperienced Colts running back group. Oliver has played in 30 career games over the last four seasons with the Chargers. In those games, he had 773 rushing yards and three rushing touchdowns to go along with 55 receptions and one reception touchdown. Colts running backs Robert Turbin and Marlon Mack suffered injuries in Thursday’s preseason opener, leaving the team short of depth at the position.